.page-contact {
  --contact-line-soft: rgba(201, 210, 224, 0.16);
  --contact-gap: clamp(26px, 4vw, 56px);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding-bottom: clamp(40px, 6vw, 88px);
  background-image:
    radial-gradient(760px 460px at 88% 4%, rgba(255, 107, 44, 0.15), transparent 66%),
    radial-gradient(620px 420px at 96% 58%, rgba(79, 224, 181, 0.10), transparent 68%);
  background-repeat: no-repeat;
}

.page-contact .contact-split {
  align-items: start;
  row-gap: var(--contact-gap);
}

.page-contact .contact-split > * {
  min-width: 0;
}

.page-contact .contact-eyebrow {
  margin: 0 0 18px;
  color: var(--silver-dim);
}

.page-contact .contact-headline {
  margin: 0 0 22px;
  max-width: 15ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(38px, 7.4vw, 78px);
  line-height: 0.98;
  letter-spacing: -0.022em;
  color: var(--white);
}

.page-contact .contact-lede {
  margin: 0;
  max-width: 48ch;
  color: var(--silver);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
}

/* ---------- 三条通道 ---------- */
.page-contact .channel-list {
  list-style: none;
  margin: clamp(30px, 5vw, 56px) 0 0;
  padding: 0;
  border-top: 1px solid var(--contact-line-soft);
}

.page-contact .channel {
  position: relative;
  padding: 22px 8px 22px 20px;
  border-bottom: 1px solid var(--contact-line-soft);
  transition: background-color 0.3s ease;
}

.page-contact .channel::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--signal);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.35s ease;
}

.page-contact .channel:hover,
.page-contact .channel:focus-within {
  background-color: rgba(23, 40, 74, 0.42);
}

.page-contact .channel:hover::after,
.page-contact .channel:focus-within::after {
  transform: scaleY(1);
}

.page-contact .channel__tag {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mint);
}

.page-contact .channel__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.4vw, 24px);
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-contact .channel__text {
  margin: 0;
  max-width: 52ch;
  color: var(--silver-dim);
  font-size: 15px;
  line-height: 1.72;
}

/* ---------- 右侧玻璃信息卡 ---------- */
.page-contact .contact-split__aside {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-contact .contact-visual {
  margin: 0;
}

.page-contact .contact-card {
  padding: clamp(20px, 3vw, 30px);
}

.page-contact .contact-card__kicker {
  margin: 0 0 20px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mint);
}

.page-contact .contact-line {
  padding: 14px 0;
  border-top: 1px solid var(--contact-line-soft);
}

.page-contact .contact-line:first-of-type {
  padding-top: 0;
  border-top: none;
}

.page-contact .contact-line__label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--silver-dim);
}

.page-contact .contact-line__value {
  display: inline-block;
  max-width: 100%;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.2vw, 19px);
  color: var(--white);
  text-decoration: none;
  overflow-wrap: anywhere;
  background-image: linear-gradient(var(--signal), var(--signal));
  background-repeat: no-repeat;
  background-size: 0% 1px;
  background-position: 0 100%;
  transition: background-size 0.3s ease, color 0.25s ease;
}

.page-contact .contact-line__value:hover,
.page-contact .contact-line__value:focus-visible {
  color: var(--signal-soft);
  background-size: 100% 1px;
}

.page-contact .contact-card__note {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--contact-line-soft);
  color: var(--silver-dim);
  font-size: 13px;
  line-height: 1.7;
}

/* ---------- 通用分栏 ---------- */
.page-contact .split-block {
  display: grid;
  gap: var(--contact-gap);
  grid-template-columns: 1fr;
}

.page-contact .split-block > * {
  min-width: 0;
}

.page-contact .chapter {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 10px;
}

.page-contact .chapter__index {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1;
  color: var(--silver-dim);
  opacity: 0.55;
  transition: color 0.45s ease, opacity 0.45s ease;
}

.page-contact .chapter__index.is-active {
  color: var(--signal);
  opacity: 1;
}

.page-contact .contact-section-title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.2vw, 38px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--white);
}

.page-contact .contact-section-text {
  margin: 0;
  color: var(--silver);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-contact .contact-subtitle {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--mint);
}

.page-contact .inline-link {
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 107, 44, 0.5);
  transition: color 0.25s ease, border-color 0.25s ease;
}

.page-contact .inline-link:hover,
.page-contact .inline-link:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

/* ---------- 合作申请 ---------- */
.page-contact .req-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-contact .req-list__item {
  position: relative;
  padding-left: 26px;
  color: var(--silver);
  font-size: 15px;
  line-height: 1.75;
}

.page-contact .req-list__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 14px;
  height: 2px;
  background: var(--signal);
}

.page-contact .req-list__item strong {
  color: var(--white);
  font-weight: 600;
}

.page-contact .support-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
  margin-top: clamp(30px, 5vw, 58px);
}

.page-contact .support-card {
  padding: clamp(20px, 2.6vw, 28px);
}

.page-contact .support-card .card__body {
  max-width: 60ch;
}

/* ---------- 纠错流程 ---------- */
.page-contact .fix-steps {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  border-top: 1px solid var(--contact-line-soft);
}

.page-contact .fix-step {
  padding: 20px 4px 20px 18px;
  border-bottom: 1px solid var(--contact-line-soft);
  border-left: 2px solid transparent;
  transition: border-left-color 0.3s ease, background-color 0.3s ease;
}

.page-contact .fix-step:hover {
  border-left-color: var(--mint);
  background-color: rgba(23, 40, 74, 0.36);
}

.page-contact .fix-step__no {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--signal);
}

.page-contact .fix-step__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--white);
}

.page-contact .fix-step__text {
  margin: 0;
  max-width: 54ch;
  color: var(--silver-dim);
  font-size: 15px;
  line-height: 1.72;
}

.page-contact .contact-visual-fix {
  margin: 0;
}

.page-contact .contact-visual-fix img {
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-contact .contact-side-note {
  margin: 18px 0 0;
  color: var(--silver-dim);
  font-size: 14px;
  line-height: 1.78;
}

/* ---------- 回复时段 ---------- */
.page-contact .hours-panel {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  grid-template-columns: 1fr;
  padding: clamp(24px, 4vw, 48px);
  background: linear-gradient(140deg, var(--deep) 0%, rgba(14, 26, 51, 0.55) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-contact .hours-clock__label {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--silver-dim);
}

.page-contact .hours-clock__value {
  margin: 0;
  font-size: clamp(30px, 5.4vw, 52px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--white);
}

.page-contact .hours-clock__sub {
  margin: 12px 0 0;
  color: var(--mint);
  font-size: 14px;
  letter-spacing: 0.06em;
}

/* ---------- 地址与到访 ---------- */
.page-contact .contact-visit {
  padding-bottom: clamp(80px, 12vw, 160px);
}

.page-contact .visit-block {
  max-width: 780px;
}

.page-contact .visit-address {
  display: block;
  margin: clamp(18px, 3vw, 30px) 0 0;
  padding-left: clamp(16px, 2.4vw, 26px);
  border-left: 2px solid var(--signal);
  font-family: var(--font-mono);
  font-style: normal;
  font-size: clamp(15px, 2.2vw, 21px);
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-contact .visit-note {
  margin: 20px 0 0;
  max-width: 62ch;
  color: var(--silver-dim);
  font-size: 14.5px;
  line-height: 1.78;
}

/* ---------- 响应式 ---------- */
@media (max-width: 899px) {
  .page-contact .contact-split > [class*="span-"] {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-contact .split-block--coop {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-contact .split-block--fix {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

@media (min-width: 860px) {
  .page-contact .support-grid {
    grid-template-columns: repeat(12, 1fr);
  }

  .page-contact .support-card:nth-child(1) {
    grid-column: span 7;
  }

  .page-contact .support-card:nth-child(2) {
    grid-column: span 5;
  }

  .page-contact .support-card:nth-child(3) {
    grid-column: span 12;
  }
}

@media (min-width: 880px) {
  .page-contact .hours-panel {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: center;
  }
}

@media (min-width: 1100px) {
  .page-contact .contact-split__aside {
    position: sticky;
    top: 96px;
  }
}